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  • Science & Medicine
NOVA brings you short audio stories from the world of science -- anything from hurricanes to mummies to neutrinos. For more science programming online and on air, visit NOVA's Web site at pbs.org/nova, or watch NOVA broadcasts Wednesday nights on PBS.

(Refeed) Dual Epidemics Threaten Koalas

Australia's koala population has been hit hard by two rapidly spreading diseases: chlamydia (a sexually transmitted infection) and a retrovirus similar to HIV. Scientists are working to develop vaccines, while lay citizens help care for sick koalas. Biologists say the epidemics, combined with other threats like habitat loss, pose a serious threat to the species.

For more global science stories, visit: http://www.world-science.org/

Funding for NOVA is provided by David H. Koch, the Corporation for Public Broadcasting, and PBS viewers.